Answer: sfumato

AnswerCrossword Clue
SFUMATO"Mona Lisa" tone-blending technique
SFUMATOTone-blending painting technique
SFUMATOArtist's tone-blending technique, used in the "Mona Lisa"
sfumatoa technique used in painting
sfumatothe subtle and minute gradation of tone and color used to blur or veil the contours of a form in painting